help wifh question 7

An analyst estimates that the Bank of America (BOA) stock will have the following return rates depending on the state of the economy. What is the expected return rate E(r)? State of the Economy Probability Return Rate Good 0.3 14% Normal 0.5 10% Bad 0.2 2% State of the Economy Good Normal Bad Probability (P) 0.3 0.5 0.2 Return Rate (R) (PER) 14% 4.20 10% 5.00 2% .40 expected rate of return -9.60 Question 7 4 points) For the above BOA stock in Q6, what is the standard deviation (a) of return rates? 0 00 Db 11 $ 3 % 5 6 & 7 8 9 E R T Y U 0 DFG H J K L CV B